// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_ARM_FRAME_CONSTANTS_ARM_H_
#define V8_ARM_FRAME_CONSTANTS_ARM_H_

#include "src/base/macros.h"
#include "src/frame-constants.h"

namespace v8 {
namespace internal {

    class EntryFrameConstants : public AllStatic {
    public:
        // This is the offset to where JSEntry pushes the current value of
        // Isolate::c_entry_fp onto the stack.
        static constexpr int kCallerFPOffset = -(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize);

        // Stack offsets for arguments passed to JSEntry.
        static constexpr int kArgcOffset = +0 * kSystemPointerSize;
        static constexpr int kArgvOffset = +1 * kSystemPointerSize;
    };

    class ExitFrameConstants : public TypedFrameConstants {
    public:
        static constexpr int kSPOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0);
        DEFINE_TYPED_FRAME_SIZES(1);

        // The caller fields are below the frame pointer on the stack.
        static constexpr int kCallerFPOffset = 0 * kPointerSize;
        // The calling JS function is below FP.
        static constexpr int kCallerPCOffset = 1 * kPointerSize;

        // FP-relative displacement of the caller's SP.  It points just
        // below the saved PC.
        static constexpr int kCallerSPDisplacement = 2 * kPointerSize;
    };

    class WasmCompileLazyFrameConstants : public TypedFrameConstants {
    public:
        static constexpr int kNumberOfSavedGpParamRegs = 4;
        static constexpr int kNumberOfSavedFpParamRegs = 8;

        // FP-relative.
        static constexpr int kWasmInstanceOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0);
        static constexpr int kFixedFrameSizeFromFp = TypedFrameConstants::kFixedFrameSizeFromFp + kNumberOfSavedGpParamRegs * kPointerSize + kNumberOfSavedFpParamRegs * kDoubleSize;
    };

    class JavaScriptFrameConstants : public AllStatic {
    public:
        // FP-relative.
        static constexpr int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
        static constexpr int kLastParameterOffset = +2 * kPointerSize;
        static constexpr int kFunctionOffset = StandardFrameConstants::kFunctionOffset;

        // Caller SP-relative.
        static constexpr int kParam0Offset = -2 * kPointerSize;
        static constexpr int kReceiverOffset = -1 * kPointerSize;
    };

} // namespace internal
} // namespace v8

#endif // V8_ARM_FRAME_CONSTANTS_ARM_H_
